From today you can get a new version of Facts are Sacred, developed specially for iPad. It has all the visualisations and text from the hardback version but with lots more. This is a book you can interact with.

It allows you to:

Facts are Sacred: cost of bringing up baby Photograph: Guardian

• Watch films on the practice of data journalism, featuring contributions from David McCandless and others, the history of data journalism and how data was used in reporting on the Olympics.

• Explore the data that came out of the 2012 US election• Find out how to track a hurricane

Facts are Sacred Photograph: Guardian

• Engage with interactive elements that show you what the world was like when you were born, or how rumours explode and are denounced on Twitter• Get the inside view on how journalists dealt with the enormous amounts of data contained in the WikiLeaks information